(19)
(11) EP 0 184 294 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
23.03.1988 Bulletin 1988/12

(43) Date of publication A2:
11.06.1986 Bulletin 1986/24

(21) Application number: 85307205

(22) Date of filing: 08.10.1985
(84) Designated Contracting States:
DE FR GB IT NL

(30) Priority: 09.10.1984 JP 21230984
09.10.1984 JP 21231084

(71) Applicant: SUMITOMO CHEMICAL COMPANY, LIMITED
 ()

(72) Inventors:
  • Doi, Toshiki
     ()
  • Shinonaga, Hideo
     ()
  • Kuribayashi, Hideyuki
     ()

   


(54) Polyolefin composition and method of coating molded article obtained therefrom


(57) A polyolefin composition is a blend of, by weight (1) 99.9-30 parts of a polyolefin (e.g. polyethylene or an ethylene-propylene block copolymer) and (2) 0.1-70 parts of a crystalline and/or rubbery copolymer of ethylene (10-80%) and propylene and optionally an olefin of 4 or more C atoms (e.g. butene-1) to which is graft copolymerised an unsaturated dicarboxylic acid or anhydride (e.g. maleic or itaconic).
The graft polymerising can be done by reacting the copolymer in an organic solvent with the acid/anhydride in the presence of a free radical generator catalyst, e.g. a peroxide.
The composition is granulated and molded to shape. The product is spray coated with a urethane which adheres well without an undercoat; the surface may however be treated to improve adhesion before coating.





Search report